Ny-Series Instructions Reference Manual (W560 - Omron NY532-5400 Reference Manual

An error occurs if this instruction is executed for Units other than NX-series Communications Interface
Units and Option Boards.
Timing Charts
The following figures show the timing charts.
 Normal end
TRUE
Execute
FALSE
TRUE
Busy
FALSE
TRUE
Done
FALSE
TRUE
Error
FALSE
ErrorID
*1 Buffer clear processing is completed.
 Error end
TRUE
Execute
FALSE
TRUE
Busy
FALSE
TRUE
Done
FALSE
TRUE
Error
FALSE
ErrorID
Related System-defined Variables
Name
_PLC_OptBoardSta
_NXB_UnitIOActiveTbl
Precautions for Correct Use
• Execution of this instruction is continued until processing is completed even if the value of Execute
changes to FALSE or the execution time exceeds the task period. The value of Done changes to
TRUE when processing is completed. Use this to confirm normal completion of processing.
• A compiling error will occur if you use this instruction in an event task. Do not use this instruction in
event tasks.

NY-series Instructions Reference Manual (W560)

*1
Cleared to 0. Updated to result. (16#0000: Normal)
Cleared to 0. Updated to result. (16#****: Error)
Meaning
ARRAY[1..2] of
Option Board Status _sOPTBOARD_
STA
NX Unit I/O Data Active ARRAY[0..8] OF
Status BOOL
2 Instruction Descriptions
Data type
• This stores the status of the Option
Board.
• This status tells the NX Units whether
I/O data communications can be pro-
cessed.
• The subscript of the array corre-
sponds to the NX Unit numbers. A
subscript of 0 means the NX bus
master.
Description
2-1227
2